Abstract The present study was conducted to find out the role of Consolida ambigua and Calendula officinalis L. ornamental plants along with Kocuria rhizophila bacterium in phytoremediation of the nickel contaminated soil. One group of ornamental plants was grown in control environment (C), while the other groups were subjected to stress conditions i.e., Treatment with Bacteria (T1), Treatment with Bacteria + Chelator (T2) and Treatment with Chelator (T3). Nickel Chloride (100 mg/kg) and citric acid (5 mM) were applied when the plant species started its normal photosynthetic activity. Preliminary results showed that plant biomass i.e., plant height (cm), fresh and dry weights (g), proline content (µg/g) and photosynthetic pigments (mg/g) were significantly increased with co-application of bacteria and citric acid as compared to non-inoculated and inoculated plant species. The growth pattern observed in order of T2 > T1 > T3 > C. The statistical significant growth with T2 at p ≤ 0.05 suggested the role of Consolida ambigua and Calendula officinalis L. ornamental plants in association with Kocuria rhizophila bacterium were beneficial for phyto-extraction purposes. It was concluded that the aforementioned plants can safely be grown for phytoremediation purposes to reduce soil pollution in term of heavy metal accumulation.

中文翻译：

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在细菌 Kocuria rhizophila 存在下通过选定的观赏植物物种修复镍污染的生态系统

摘要 本研究旨在探究Consolida ambigua 和Calendula officinalis L. 观赏植物以及Kocuria rhizophila 细菌在镍污染土壤的植物修复中的作用。一组观赏植物在对照环境（C）中生长，而另一组则经受胁迫条件，即用细菌处理（T1）、用细菌+螯合剂处理（T2）和用螯合剂处理（T3）。当植物物种开始其正常光合作用活动时，施用氯化镍 (100 mg/kg) 和柠檬酸 (5 mM)。初步结果表明，植物生物量即株高（cm）、鲜重和干重（g）、与未接种和接种的植物物种相比，随着细菌和柠檬酸的共同应用，脯氨酸含量 (μg/g) 和光合色素 (mg/g) 显着增加。观察到的生长模式为 T2 > T1 > T3 > C。 T2 在 p ≤ 0.05 处的统计显着增长表明 Consolida ambigua 和 Calendula officinalis L. 观赏植物与 Kocuria rhizophila 细菌相关的作用有利于植物提取目的。得出的结论是，上述植物可以安全种植用于植物修复目的，以减少重金属积累方面的土壤污染。05 表明 Consolida ambigua 和 Calendula officinalis L. 观赏植物与 Kocuria rhizophila 细菌相关的作用有利于植物提取目的。结论是，上述植物可以安全地种植用于植物修复目的，以减少重金属积累方面的土壤污染。05 表明 Consolida ambigua 和 Calendula officinalis L. 观赏植物与 Kocuria rhizophila 细菌相关的作用有利于植物提取目的。结论是，上述植物可以安全地种植用于植物修复目的，以减少重金属积累方面的土壤污染。